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The "system" shown is composed of a 50Hz, 50 MVA, 13.2kV star-grounded alternator which is connected to a line through a delta/wye transformer. The positive, negative and zero sequence impedances of the alternator are j0.1, j0.1 and j0.5 p.u. respectively. The transformer rated at 13.2kV delta/120kV wye, 50 MVA with star solidly grounded has the sequence impedances of X"=X2=X0=j0.1 p.u. each. For the unsymmetrical fault shown determine:
a. The fault current, IF, at the fault point (both p.u. and actual values)
b. The line currents Ia , Ib and Ic (both p.u. and actual values)
c. The line voltages Vag , Vbg and Vcg (both p.u. and actual values)
For the spring system shown in the accompanying figure. determine the displacement of each node. Start by identifying the size of the global matrix.
at no load and rated volatge, the speed is 1200rom, and the armature curnt is 3ampere. at fullload and rated volatge ,the line curent is 47 ampere and bcuz of aarmature reaction the fluc is 4% less that its no load value 1) what is the full no loa..
if the DFTs are computed using a radix- 2 FFT algorithm. Use this formula to determine the minimum value of N for which the FFT method requires fewer real multiplications than the direct evaluation of the convolution sum
Explain the difference between an open loop and a closed loop.
A filamentary current along thex axis has a current in the b a x direction. A square loop of current in the xy plane centeredat (0,10,0) has a current in the counter-clockwise direction. What is the direction of the netforce on the loop
Design a personalized key holder for a recreation vehicle that is used occasionally. When not in use, it must hang on a wall or key rack. The material is to be lightweight and colorful.
a. Evaluate X(s) and specify its region of convergence. b. Determine the values of the finite numbers A and t0 such that the Laplace transform G(s) of g(t) = Ae^âˆ'5tu(âˆ't âˆ' t0)
Five 1.5-V batteries in series are required to operate an 8.0 Wportable radio. What is the current flow What is the equivalent circuit resistance
A parallel-plate capacitor is charged by a battery, and the battery is then disconnected from the capacitor. Because the charges on the capacitor plates are opposite in sign,they attract each other. Hence, it takes positive work to increase the p..
List at least four tasks the gateway may do ? List at least four transmission media and formats that a media gateway should be able to support.
For the motor in Problem 6-5, what is the slip at the pullout torque? What is the pullout torque of this motor?
An electron is released from rest at a distance of 0.350 m from a large insulating sheet of charge that has uniform surface charge density 4.90×10^-12 C/m . A) How much work is done on the electron by the electric field of the sheet as the electron..
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